<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>feature</title>
</head>
<body>
    <script>
        // includes
        const mingzhu = [`西游记`, `红楼梦`, `三国演义`, `水浒传`]

        // 判断
        console.log(mingzhu.includes(`西游记`));
        console.log(mingzhu.includes(`金瓶梅`));

        // **
        console.log(2 ** 10);   // Math.pow(2, 10)
    </script>
</body>
</html>